For example, we could start PowerShell from the command line, or vice versa.
Similarly, Bash Ubuntu, you can also run it directly from another console as a command line or PowerShell.
First, make sure that you include Ubuntu Bash function in advance. If it was open a command prompt and enter PowerShell commands or Bash / Bash.exe directly run Ubuntu bash console.
Thus, Ubuntu bash can be run from the command line or PowerShell console. In addition, you can directly control the ubuntu bash, depending on the circumstances. And if you want to get out of Bash ubuntu and back with the help of the previous console. Just type exit command.